Which is the result of genetic drift?

A) increase in the size of the gene pool

B) a decrease in genetic diversity

C) an increase in total allelic frequency

D) decrease in the size of the population

B.)

Explanation:

Although genetic drifts can change allelic frequencies, it doesn't specifically increase it. It does not increase in the size of the gene pool nor does it cause a decrease in the size of the population. B is correct.